Reproduction System and Embryology Quiz-05
Dear Readers,
NEET is the most famous and important medical entrance examination held in our country. This exam is an objective type, an offline test which includes 4 sections namely– Physics, Chemistry, Botany, and Zoology. The maximum marks that can be scored are 720 marks and have 180 questions.
About half of the paper consists of questions from Biology, as the NEET exam essentially focuses on capacitating students to go for seats in medical courses. One of the most significant and crucial sections in the NEET exam is of Biology. It comprises of theories, descriptions, discoveries, diagrams, definitions, explanations of differences, and relations. The majority of the topics covered in the NEET syllabus are from the NCERT syllabus of Class 11 & 12 and other related sources become part of the rest of the syllabus.
Clear Exam curates a list of articles selected by professionals who recommend the highly vital topics for NEET exams. The table below takes you directly to the respective topic where the in-depth article and the MCQs are available for an easy and productive learning experience. Prior to solving NEET question papers or practicing mock tests, you must ensure to study the basic concepts in NEET and practice a few sample questions related to this exam. Students will be covered for all their studies as the topics are available from basics to even the most advanced.
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Q1.
Cleavage is the rapid mitotic division. It occurs in
Solution
(b) Implantation (i) Zygote divides rapidly by mitotic division. This is called cleavage. As a result 2, 4, 8, 16 daughter cells are produced which are termed as blastomeres (ii) Embryo with 8-16 blastomeres is called a morula (iii) The morula changes into a large mass of cells called blastocyst, which passes further into the uterus (iv) Blastomeres in the blastocyst are arranged into an outer layer called trophoblast and an inner group of cells attached to trophoblast called inner cell mass (v) The trophoblast layer gets attached to the cells of the endometrium and the inner cell mass gives rise to the embryo (vi) The cells of endometrium divide rapidly and cover the blastocyst (vii) So, the blastocyst gets embedded in the endometrium of the uterus. This is called implantation, which leads to pregnancy
(b) Implantation (i) Zygote divides rapidly by mitotic division. This is called cleavage. As a result 2, 4, 8, 16 daughter cells are produced which are termed as blastomeres (ii) Embryo with 8-16 blastomeres is called a morula (iii) The morula changes into a large mass of cells called blastocyst, which passes further into the uterus (iv) Blastomeres in the blastocyst are arranged into an outer layer called trophoblast and an inner group of cells attached to trophoblast called inner cell mass (v) The trophoblast layer gets attached to the cells of the endometrium and the inner cell mass gives rise to the embryo (vi) The cells of endometrium divide rapidly and cover the blastocyst (vii) So, the blastocyst gets embedded in the endometrium of the uterus. This is called implantation, which leads to pregnancy
Q2.
Eunuchoidism is due to the failure of production of
Solution
(b) If testes are removed before maturity, the secondary sexual characteristics will not develop due to absence of male hormone testoterone. Such a condition is known as eunuchoidism.
(b) If testes are removed before maturity, the secondary sexual characteristics will not develop due to absence of male hormone testoterone. Such a condition is known as eunuchoidism.
Q3.
How many compartments (approx.) are there in each human testis?
Solution
(a) There are about 250 compartments in human testis called testicular lobules
(a) There are about 250 compartments in human testis called testicular lobules
Q4.
The target ICSH is
Solution
(c) The target of Interstitial Cell Stimulating Hormone (ICSH) is the interstitial cell. Interstitial cells produces testosterone which is responsible for the development of secondary sexual characters
(c) The target of Interstitial Cell Stimulating Hormone (ICSH) is the interstitial cell. Interstitial cells produces testosterone which is responsible for the development of secondary sexual characters
Q5.
Sperm lysins contains
Solution
(d) Sperm lysins contains hyaluronidase, corona penetrating enzyme, acrosin etc. There are many enzymes in the acrosome like fertilisin, hyaluronidase, pectin corona penetrating enzyme, acrosin etc., together they are called sperm lysins
(d) Sperm lysins contains hyaluronidase, corona penetrating enzyme, acrosin etc. There are many enzymes in the acrosome like fertilisin, hyaluronidase, pectin corona penetrating enzyme, acrosin etc., together they are called sperm lysins
Q6.
Anti-fertilizin is present on
Solution
(d) Spermatozoa contains a proteinaceous substances known as anti-fertillizin. It is a protein, which is composed of acidic amino acid.
(d) Spermatozoa contains a proteinaceous substances known as anti-fertillizin. It is a protein, which is composed of acidic amino acid.
Q7.
Which part of ovary in mammals acts as an endocrine gland after ovulation
Solution
(a) After ovulation, frog Graafian follicle acts as an endocrine gland because it secretes progesterone hormone for the maintenance of pregnancy.
(a) After ovulation, frog Graafian follicle acts as an endocrine gland because it secretes progesterone hormone for the maintenance of pregnancy.
Q8.
Primary oocyte surrounded by a layer of granulosa cells is called
Solution
Q9.
In human, the unpaired male reproductive structure is
Solution
(b) The male reproductive system, prostate gland is a single, large gland. It is situated around the first part of the urethra. It secretes a thin, milky fluid that contains calcium, citrate ion, phosphate ion, a clotting enzyme and a profibrinolysin.
(b) The male reproductive system, prostate gland is a single, large gland. It is situated around the first part of the urethra. It secretes a thin, milky fluid that contains calcium, citrate ion, phosphate ion, a clotting enzyme and a profibrinolysin.
Q10.
Grey crescent is the area
Solution
(c) The grey crescent area is an area just opposite to the entry of sperm into ovum.
(c) The grey crescent area is an area just opposite to the entry of sperm into ovum.
